Question:
In Whittaker?s system of classification, prokaryotes belong to the kingdom
In Whittaker?s system of classification, prokaryotes belong to the kingdom
Updated On: Jun 7, 2022
- Monera
- Protista
- Animalia
- Fungi.
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The Correct Option is A
Solution and Explanation
R.H. Whittaker had proposed a five kingdom system of biological classification in 1969. It is based on complexity of cell structure, body organization and mode of nutrition. The kingdom Monera includes all prokaryotes. They are basically unicellular with peptidoglycan in cell wall. Naked circular DNA is coiled to form nucleoid without association with histones, ribosomes are 70S, thylakoids are present in photoautotrophs but other membrane bound organelles are absent. These are heterotrophic, phototrophic or chemotrophic in their mode of nutrition. The bluegreen algae, nitrogen fixing bacteria and methanogenic archaebacteria are all unicellular prokaryotes so they are included in the Kingdom Monera.
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Biological Classification
The process of grouping living organisms into categories is called biological classification. The most modern 5-kingdom classification was put ahead by an eminent scientist R.H.Whittaker. The five-kingdom classification is based on the criteria like cell structure, mode of nutrition, body form, and reproduction. One of the most important characteristics of this system is that it follows the evolutionary sequence of living organisms. The organisms are classified into distinct taxa or levels like Kingdom, Phylum, Division, Class, Order, Family, Genus, and Species. The 5 kingdoms are as follows:
